The Paris Agreement, dated December 2015, gives some comfort that renewable energy generation will be ever more important in years to come. However, the likely future of renewables is one where they can be competitive without subsidy. In some cases, that is already a reality but there is still a long way to go. Energy storage is likely to be a game changer in helping renewables along this road. In the introduction to this guide we look at how energy storage fits into renewable energy-focused networks of the future and some of the remaining challenges of commercialising storage facilities. This edition of the guide now covers renewable incentives in 22 major countries with the addition of three new leading jurisdictions: China, Russia and the USA.